Improvement in machines for tapping pipe-fittings



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Machines for Tapping Pipe-Fittings. N0. 136,621, PatentedMarchH,1873.

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Machines f nr Tapping Pipe-Fittings.

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ETHAN ROGERS, OE CLEVELAND, OHIO.

. IMPROVEMENT lN MACHINES FOR TAPPING PIPE-FITTINGS.

Specification forming part of Letters Patent No. 136,621, dated March 11, 1873. y

I To all whom it may concern: I

Be it known that I, ETHAN ROGERS, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and Improved Machine for Tapping Gas-Fix! tures, 8vo.; and I do hereby declare that the following is a full, clear, and complete description thereof, reference being had Yto the accompanying drawing making part of the same.

Figures 1, 2, 3, and 4 are side elevations of the machine. Fig. 5 is a plan view.

The several Igureson Plate 5 are detached sections, to which reference will be made.

Like letters of reference refer to like parts in the several yviews presented.

The nature of this invention relates to a machine for cutting threads in gas fittings, Sac.; and the object thereof is to facilitate the work of cutting said threads, and to produce them of a uniform size.

The construction and operation ofthe above specified machine are as follows:

In the drawing, A represents a frame, supported on the legs B. In the upper side of said frame are arranged the screw-taps D E F, Fi'g. 5, Plate 3. `The relativeposition they hold to each other is such as shown in the drawing, vin which it will be seen that the taps D F are in the same axial line, whereas the tap E is at right angles therewith. Im mediately below said screw-taps are arranged in like order screw-taps G H I, Fig. 3. The tap I is not clearly shown, it being hidden by the mechanism. Each of the taps referred to is fitted in the end of a mandrel, J. Said mandrel in turn is loosely fitted in a bevel-wheel, K, whereby said mandrel and taps are made to rotate, the mandrels being feathered in the Wheels, which permit of their sliding therein, and at the same time rotate them for working the taps. In the outer end of each mandrel is secured ai screw, L 5 to'each screw is fitted a nut, M, the purpose of which will presently be shown. Said nut is formed with a neck, which is fitted in the end of the stay N, where-` by the outer end of the screw is supported, and the nut held in position and prevented from running along the screwfthe screw 'being made to work in and through the nut.

Motion is' given t thev wheels K for .operating the taps D F by means of the interme;

diate or transfer wheels O, Fig. 5, which in turn receive motion from the wheel K on the mandrel of the tap E. In connection with the wheelK is a companion wheel, P, whichvis made to engage a Wheel on the mandrel J, Fig. 2, on which mandrel. is also the drivingwheel Q, Figs. 1 and 2. By this arrangement of wheels, on power being applied to the driving-wheel Q, the taps DE F are operated, and at the same time operating on the lower ta-ps G H I by a similar arrangement and combination of gearing, directly andV indirectly engaged with the driving-wheel Q, which taps are all operated in the same direction.

The motive power applied to the wheel Q is received from the pinions It S, Fig. 5, one on each sideof the wheel, as shown. The shafts A', to which the pinions are secured, have their bearings inthe bosses Tot the frame A. 0n one side of each pinion is attached a section, U, of a clutch. The corresponding section of each clutch is attached, respectively, to the pulleys V W-directly to the pulley V, and by means of a sleeve, X, to the pulleyW, as shownin Fig..5. Said pulleys are loose on their shafts; hence they are free to slide thereonin order to become engaged or disengaged with the pinio1i's,-for a purpose hereinafter shown.

The pulleys are made to slide on the shafts, for the above-specified purpose, by means of the following device: Each of the pulleys referred to is secured to its respective shaft by a sleeve, B and Hf, Figs. 5 and l1. 'lo each of the sleeves is attached a rod, C', Figs. 6 and 11; the rod passes through or into the shaft, it being made hollow for its admission. The end of the rod is secured to the end ofthe sleeve, which is made to fit on over the end of the shaft as a sliding cap, as shown in Fig. 11. The inner ends of the clutch-rods C are connected to a lever, D', Fig. 11, one at each end of the lever, which lever has a pivotal fulcrum at E', thereby allowing to each end thereof a vibratory motion for sliding the sleeves or clutches of the pulleys into engagement with or disengagement from the pinions It S. The lever Dl is actuated for operating the clutches by a screw, F, Fig. 5. Said screw is fitted to and works in a barrel-nut, G'. The barrel part of the nut forms a journal, of which H" is the seat, for the rotation of the nut, which mm, i I Y l of the nut it will not run along on the screw,

but that the screw will work along through the nut, as the nut is made to4 revolve by the pinion I'.

The opposite end of the screw is supportedl by a post, J', Fig. 3, in'which it is loosely tted, but kept from revolving with the nut by a groove in the screw, and a feather in the post-hole, of the ordinary construction. Said screw passes loosely through a lug, K', attached to and projecting upward from the end of the lever D'.` On each side of the lug is a collar or carrier, L' L", Figs. 4, 6, and 7, the purpose of which will presently be shown. M', Fig. 5, is an arm, pivoted in the stay N'. In the free end of the arm is a roller, O', which is made to run up the edge of the arrow-shaped head P' of the lever D', and which is continued in close contact therewith by the spring Q'. To the opposite end of the lever D' is pivoted a check bar or slide, R', Figs. 5 and 11. The unpivoted end of said check-bar is held by a stud, S', Fig. 8, inwhich it can freely slide backward and forward, to engage the wheel T', in the periphery of which there are formed four notches, U', Fig. l2. Said notches have a qnartering relation to each other, into which the end of the ba-r is projected successively as the wheel revolves, for arresting its revolution and holding it for a time, for a purpose hereinafter shown. Said wheel is made to revolve by the miter-pinion V', Figs. 10.and 11, securedV to a journalsleeve, which sleeve has its bearings in a stud, NV'. In said sleeve is secured a shaft, X', around which is coiled a spring, Y, as shown in Fig. 11. 'lo said shaft the miter-pinion and sleeve are keyed. A", Figs. 1'1 and 12, is a sliding clutch, whereby the shaft X' and pinion are coupled to the shaft B", driven by the pulley C". .On the upper side of the slide R', referred to, is secured a spring, D", on the face of which is formed a shoulder, a, Fig. 12, the purpose of which is to engage an arm, E", for operating the clutch A". Said arm is secured to a shaft journaled in the standard G". O11 the opposite end of the shaft is secured an arm, H", which is also employed for operating the clutch, as will presently be shown. In combination with the several devices above described, is a clamp-wheel, I", Figs. 2 and 4, the purpose of which is to hold the gas-fittin gs, &c., while being tapped. From the periphery of said wheel projects a series of rigid jaws, J", Figs. 2 and 4; also a series of movable jaws, K". Said movable jaws are pivoted to the wheel at the point b, and are connected to theArigid jaw by a pair of links, L". The connection of the links with the rigid jaw is made by an eccentric, c, to which the ends of the links are ypivoted, so that on turning the eccentriclby means of the handle M", Figs. 3 and. 5, 'the free` jaws are drawn toward the rigid ones, and are lockcd in such .relation therewith by the axial centers of the eccentric and links coming in a'right line or on a dead-center. A reverse movement of the free jaw'svis effected by springs N" when the eccentricsare thrown off from such center.

Having described the several lparts of thc tapping-machine, the practical operation thereof is as follows: As above-said, the use ofthe machine is for cutting the threads in gasiittings, such as the Tand L couplings connecting the gas-pipes, dro. A T-coupling is placed 1 in the clamp of the wheel I", between the dogs or boxes d, Fig. 2, and in such relation with it as to bring the stem of the T in a radial line of the wheel and the arms transversely there: with, as indicated bythe dotted lilies, Fi g.' 2. In this position the T or coupling is clamped by the movable jaws K", operatedin the manner as above described. Each of the jaws. is provided with a T, the position of whichin their relation to the taps is such as to brin g the bore of the coupling or T in direct line withthe three taps above and the three tapsbelow on turning the wheel. The oblique position of the tap F and that ofthe corresponding one below it is such as to allow them to enterthe stems ofthe couplings at the same time that the side taps enter the armsthereof;l hence two couplings are tapped-at once. Thus, let it be supposed that the wheel has been so turned as to bring two couplings into proper position for receiving the taps, which at this time, by means of the gearing, are running in the right direction for entering the ends of them. The several taps are fed into the `ends by means of the screws L, terminating the outer ends of the mandrels J carrying the taps. Said mandrels are loosely fitted in the pinions K, and, being feathered therein, are thereby allowed to slide freely through them at the same time that they are rotated. During the time that the several taps are screwing into the couplings-which is when the clutch U of the shaft A' is engaged with the pulley V, Fig. 5, and consequently the sliding clutch X disengaged, thus changing their relation from that shown in said Fig. 5 to that indicated by the dotted linesf, Fig. 1l-

- the screw F', Fig. 5, is being worked forward in direction ofthe arrow by the pinionsRand I'. In this working of the screwthe collar L' pushes against the lug K', thereby forcing the head P' of the lever D' forward until the apex of the angle of the headpasses the axis ofthe roller O'. Said roller, in consequence of the spring Q', forces the lu g quickly away from the collar by rolling on the opposite angle of the head, thereby bringing the lever D' to the position shown in the drawing, the result of which is an immediate disengagement of the clutch Uof the shaft A' and an engagement of the clutch of the pulley W, as shown in Figs. 5 and 11.. This reversal ofthe engagement of the clutches causes a reverse action ot' the taps, sothat they are nowworkin g out from the ends of, the coup;- lings. Immediately that .the taps are released therefrom the clampywheeljsmade to revolve oiieqnartrofthe way round,"in" order to bring two more couplings, in position for tapping. Those having been tapped are discharged from the clamps b'y the handles M" thereof striking upon the trip' O", Fig. 5, which throws the cams off from the dead-centers. The springs N" open the movable jaws of the clamps, and the couplings fall out below the'wheel onto the door, and are replaced by others while the tapping is being done. The clamp-wheel is made to revolve at the proper time, for the purpose above-said, as follows: The action of the lever D' in changing the arrangement of the clutches, as above described,`at thev same time draws back the slide B' fromits engagement with the wheel T', leaving it free to berotated also, during the* same time, the action ofthe screw F' is reversed, thereby causing the collar L" to' press against the lug K' and force it back until the roller O' passes the 'apex of the head P', which thenrolls down on the edge of the angle on theopposite side to'about half-way, it being arrested at that point by the end of the slide B' impinging upon the edge of the wheel T'. It will be obviousthat this movement of the slide is effected by the action of the lever P' actuated by the reverse movement of the screw F', forcing' the lever bach from its'position shown in Fig. ll nearly to that indicated by the dotted: lines, but not' quite that far, it being restrained from going that farby the slide R' resting against the edge of thewheel, as aforesaid, which at this time is rotated bythe bevel-pinion V',`which the spring Y couples with the shaft B" by means of the sliding clutch A", said shaft B" being driven by the vpulley C",Fig. ll. During this quartering momentary movement of the wheel T' both of the clutches Uare disengaged, -as the action of the lever D' has been only sufficient vto disengage the one without causing an engagement of the other. The fullactionof the lever having been arrested by the end of the slide'impin ging upon the edge of the wheel, therefore the taps are momentarily at rest, or during the time that the wheel is moving from one notch, U',to another, into which the slidev now-enter the couplings, just bro u ght-into proper position for that purpose by the rotation of the wheel T'and clamp-wheel actuated` thereby. The moment that the-slideslips into a notch the motion ofthe wheel is arrested by the pinion V' becoming at that instant disengaged y from the shaft B". This dis'en gagement is'produced bythe renewed action ofthe slide caused by its slipping-fbrwardinto the notch, as above 1 described.V A lug, a, Figs. 5 and 1.1,on the side of the' slide,`engages, as said slide springs for-- ward, acollar,m ,1 `igs.10 and lll', and forces the clutch A" `from its `connection with the shaft,

the arrow, carrying with it the head end of the lever D' until the apex of 'the head is passed over by the roller, which, as aforesaid,shifts the clutches, thereby reversing the movements of the taps fortheir withdrawal from the couplings. This shifting of the clutches is accompanied by the withdrawal of the slide from the wheel, as above shown; but in order to prevent lat this moment an engagement of the clutch A" with the shaft B" by the withdrawal of the luga from its contact with the collar of the clutch, the free end of a pawl, H", is caught on the inside of the collar, as shown in Fig. 10, thereby holding the clutch from slipping back Vand becoming engaged with the shaft when lthe luga is drawn therefrom bythe withdrawal of the slide from the wheel, as aforesaid. By the time that the taps are withdrawn the lever is again halfchanged by the reverse action of the screw F', and for a moment, as before stated, neither of the clutches U X are engaged, so that the taps are for a short period of time inactive. This partial or half action of the lever moves forward the slide, and at the same time' the pawl H" is lifted from its engagement with the clutchA" by the arm E", Fig;12, be?

in'g caught on the-ed ge of the shoulder-a raised on the upper side ofthe spring D" attached to Y the slide. VThe clutch, on being thus released from' the pawl, is' forced back bythe spring Y, 'and thereby made to engage the sha-ft B" for rotating the wheel T', &c., for the Vpurpose n' above-said.

The general operation of the machine is such that whenV the clutch U is engaged with the pulley V the taps are working into the couplings at the same timethe screw F'is operatwheels T', so that it maybe free to rotate at the proper moment for 'revolving the clamp wheel 1' in which is held thework while be-` ing tapped, and during the withdrawal of the taps, by the engagement of the" clutch U with the vpulleyV7 the screw F' isioperating the 1ever in the opposite direction for the purpose of again changing the en gagementof the clutches -U and X, and to project forward the slideinto the wheel T' and 'cause it to revolve by its 'clutch' connection with the shaft B" and pulley C". Each consecutive movement of the wheelT' turns the clamp-wheel so far'around as to-bring two couplings in proper relation to -the taps--one to the upper set of taps and one to the lowerv set, both of Vwhich are operated Von atthe same time and discharged from the wheel by the-same device.` A I v The length that the thread maybe cut in the couplings can bevaried by shifting the position 'of the collars L' L" on the screw F'. V lf the thread is to be'a short one the collars are adj usted'nearer to the lug K', and it' along thread is required the collars are set further apart.

Different sized taps and pitch of thread can be used in this machine, as the work may require, by removing the screw and nut L M of the taps and replacing them with others.

The dogs or boxes attached to the movable jaws l may be adjusted nearer to the dogs on the ri gid jaw by means ofthe adjusting-nuts h, whereby th ey are secured to the jaw, so that different sizes of T and L shaped couplingscan be held for being tapped; also, aless number of the taps may be used, as the nature of the Work may require.

The dog or box d attached to the movable jaw is secured thereto by a bolt, f, Fig. 13, Plate 5. Said bolt passes through both the jaw and box in a sleeve, g, screwed into the jaw, as shown in Fig. v14. 0n the projecting end of the bolts are jam-nuts h. In order to adjust the box nearer to the one in the stationary jaw the sleeve g is turned by the application of a wrench to the collar. By this means the box is pushed forward and away from the jaw, but does not become loose, as the jaw-nuts draw the back of the box against the end of the sleeve, which is thereby held firmly in place.

Claims.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The upper system of taps D EF and the lower system G H I, as arranged to cooper ate in relation to each other and in combinationiwiththe clamp-wheel l, substantially in the manner and for the purpose set forth.

2. The Screw F' and lever D', in combination with the clutch U and pulley V and clutch X and pulley NV, substantially in the manner as and for the purpose specified.

3. The spring QJ, arm M', and roller O', as arranged in combination with the lever D', in in the manner as and for the purpose set forth.

4. The adjusting-collars L', as arranged in combination with the screw F' and lever D", for the purpose specified.

5. The slide R', as arranged in combination with the lever D', wheel T', and clamp-'Wheel l", substantially in the manner as and for the purpose set forth.

6. The shaft B", clutch A", collar m, spring Y, slide R', lug n, and pinion V', as arranged to operate in combination with the Wheel 1" and clamp-Wheel I", in the manner as and for the purpose set forth.

7. The spring D", shoulder c, pawl H", and arm E", as arranged to operate in combination with the clutch A." and shaftB", substam tially in the manner as and for the purpose set lVitnesscs: i

J. H. BURmneE, A. F. CORNELL. 

